Angelina Yes, that's a very controversal passege. A marriage is a promise in front of god, as well as a holy sacrament. It contains the obligation to practice and spread the religion within your family, a so-called home church, and as well to have children who are to safe humankind from dieing out and make sure the religious believe won't die out over time.
Because homosexual coupples can't make homosexual children themselves the opinion of the church of homosexual couples is very controversial... on the one hand we are all children of god, no matter of our sexual orientation, on the other hand they can't fullfill the sacrament of marriage the way it was written to be.
In my opinion, as homose ual coupled can adopt a child and give them a good life by that, they are not inable to fullfill the sacrament.